Bromodiethylacetylurea.



UNITED STATES PATENT OFFICE.

Jfi'RGEN CALLSEN, OF ELBERFE'LD, GERMANY, ASSIGNOR T FARBENFABRIKEN VORM. FRIEDR. BAYER & CO ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

BROMODIETHYLACETYLUREA.

No Drawing.

Specification of Letters Patent. Application filed Hay 6,-1910. Serial No. 559,732. (Specimens) Patented Feb; '7, 1911.

the hitherto unknown bromodiethylacety- 1 lurea of the formula:.

CzHc /BI v 0235 \CONI I'-OONH:

which has proved to be a valuable sedative,-

an average dose being from to 1} gram. The prbcess for its. production consists in treating urea with bromodiethylacetylbro- In brder to illustrate my process more fully the following example is given, the parts being by weight: 120 parts of urea are mixed together with 258 parts of bromodiethylacetylbromid (obtainable by the action of bromin upon diethylacetic' acid anhydrid.) Theamixture is allowed to stand for 12 hours and is then heated for 3 hours on the water bath. After cooling the mass of the reaction is pulverized and stirred with Water and such a quantity of 'sodiumcarbonate that the mixture j'ustshows an alkaline reaction. V n

The new product is filtered' ofl' and recrystallized from alcohol. It forms a colorless, tasteless and odorless white crystalline pow- 40 def melting at from 114:118 C. It is difficultly soluble in cold water, petrolic ether and ligroin, easily soluble in alcohol and acetone. It is split up by treatment with caustic soda lye, the reaction probably bemg a .very complicated one; owing to the fact that caustic soda acts in various mannew on the molecule It may substitute the hydroxyl group for bromin, it may also split oft hydrobromic acid and form a double l nk. It may also split off urea whichm ght further be decomposed in carhome acid and ammonia The following formulae will illustrate these reactions:

CzHc BI r 1 N 0H- coie ooNH-cogr1= a CgH5 OH 0211/ C0.NH-CONH or CH3.CH\

02m, \CO.NHCONH| or Unfi B1" The herein described bromodiethylacetylurea, being awhite cr stalline powder melting at 1l4-1'1'8 C. di cultly soluble incold water, petrolit: ether and ligroin, easily soluble in alcohol and ether, being a' valuable sedative, substantially as described.

In testimony whereof I have hereunto set' my hand in the presence of two subscribing witnesses. I

JURGEN. OALLSEN. 1.8;

Witnesses:

O'r'ro KoNIG, I CHAS. J. WRIGHT. 

